If you want to start taking creatine then I would recommend getting something additional than just using assault. You want to take in around 5g total a day and maybe more depending on your size and if you are preloading. Kre-alkalyn or C-bol by thermolife each have 3g of creatine, so it would work out perfect to cycle with the assault. I mentioned these two types of creatine just because I recommend them and they have worked for me.
As far as not taking creatine on non workout days, I believe in the first couple weeks of taking creatine to would take on non workout days. Once the creatine is fully in your system then I do not take on non workout days. It's kind of my preloading stage in a sense to take on non workout days for the first two weeks. Good luck sir.